• MESO: Mesoscale Discussion 0403

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, May 13, 2018 23:23:50
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    ACUS11 KWNS 132323
    SWOMCD
    SPC MCD 132323
    INZ000-140130-

    Mesoscale Discussion 0403
    NWS Storm Prediction Center Norman OK
    0623 PM CDT Sun May 13 2018

    Areas affected...Northern/Central IN

    Concerning...Severe potential...Watch unlikely

    Valid 132323Z - 140130Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Strong winds may accompany convection as it spreads across
    parts of Indiana this evening.

    DISCUSSION...Low-level warm advection induced deep convection across
    western IA earlier this morning. This activity has maintained some
    organization as it spread quickly across IA/northern IL into
    northwest IN. Small cluster of likely elevated storms is racing
    east-southeast at roughly 50kt and may turn a bit more southeast as
    it propagates toward east-central IN over the next few hours. Given
    the speed of the convection there is some concern for damaging winds
    with this activity; however, likely elevated nature of these
    updrafts may limit damaging wind potential. While it's not entirely
    clear how efficient downdrafts will be with this cluster the speed
    of the convection demands some attention for damaging winds. WW will
    not be issued until this threat is more clear.

    ..Darrow/Guyer.. 05/13/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...IWX...IND...LOT...

    LAT...LON 41248698 40868486 40098505 40148626 40618750 41248698



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, April 19, 2019 17:19:54
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    ACUS11 KWNS 191719
    SWOMCD
    SPC MCD 191719
    SCZ000-GAZ000-191845-

    Mesoscale Discussion 0403
    NWS Storm Prediction Center Norman OK
    1219 PM CDT Fri Apr 19 2019

    Areas affected...Southeast GA...SC

    Concerning...Tornado Watch 89...

    Valid 191719Z - 191845Z

    The severe weather threat for Tornado Watch 89 continues.

    SUMMARY...Severe threat is shifting into SC.

    DISCUSSION...Severe squall line has evolved along leading edge of
    strong large-scale forcing for ascent. LEWP is evident over
    southwest SC and this forced line of convection is surging northeast
    at roughly 45kt. Damaging winds appear possible with these storms as
    they spread across the northeastern half of ww89. While a tornado
    can not be ruled out with the squall line, primary tornado threat
    remains with discrete structures ahead of the linear MCS.

    ..Darrow.. 04/19/2019

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...ILM...CHS...CAE...GSP...JAX...FFC...TAE...

    LAT...LON 31768317 34498244 34497980 31768061 31768317



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